All, I am about to dive into this for my 2019 ST and I appreciate what you have posted, as it is very helpful.
I am wondering if there is the possibility of machining a port to add a drain plug. Those who have had things opened up, is it possible?
Also, I have put together a document this and thought I would post here. I hope you do not minde that I cut and pasted some of your diagrams and photos. I am giving you guys alal the credit on this thread and not making this document for anyone but myself.
2019_Edge_ST_AWD_Bump_Reference.pdf